Microstructure for dual view display and optical film and liquid crystal display module using the same

Abstract

The disclosure provides a microstructure for dual view display and an optical film and a liquid crystal display module using the same. The microstructure for dual view display includes a substrate; a left peak and a right peak formed on the substrate, wherein the left peak and the right peak exhibit right-and-left symmetry, the tip of the left peak is inclined in a direction away from the tip of the right peak relative to the bottom of the left peak, and the tip of the right peak is inclined in a direction away from the tip of the left peak relative to the bottom of the right peak, the left peak has a reflecting surface on a side of the tip of the left peak which is close to the right peak and a light-emerging surface on a side of the tip of left peak which is away from the right peak, and the right peak has a reflecting surface on a side of the tip of the right peak which is close to the left peak and a light-emerging surface on a side of the tip of right peak which is away from the left peak.

What is claimed is: 
     
       1. A microstructure for a liquid crystal display backlight comprising:
 a substrate; and 
 a first peak and a second peak formed on the substrate, wherein: 
 the first peak and the second peak exhibit right-and-left symmetry, a tip of the first peak is inclined in a direction away from a tip of the second peak relative to a bottom of the first peak, and the tip of the second peak is inclined in a direction away from the tip of the first peak relative to a bottom of the second peak, the first peak has a reflecting surface which is close to the second peak and a light-emerging surface which is away from the second peak, and the second peak has a reflecting surface which is close to the first peak and a light-emerging surface which is away from the first peak, such that, in response to that a light from the liquid crystal display backlight passes through the substrate, the light from the substrate is reflected by the reflecting surface to the light-emerging surface, and finally refracted in an angle that the light intensively exits from the light-emerging surface, wherein the reflecting surface is formed by coating a reflecting layer such that the light from the substrate does not transmit through the reflecting surface. 
 
     
     
       2. The microstructure according to  claim 1 , wherein the light from the substrate is a parallel light perpendicular to the substrate on the first peak and the second peak, and the parallel light keeps parallel after being reflected by the reflecting surface. 
     
     
       3. The microstructure according to  claim 2 , wherein the parallel light keeps parallel after exiting from the light-emerging surface. 
     
     
       4. The microstructure according to  claim 1 , wherein the light finally exiting from the light-emerging surface and the light from the substrate have an angle of 20 to 60 degrees. 
     
     
       5. The microstructure according to  claim 1 , wherein the substrate is made of polyethylene terephthalate. 
     
     
       6. The microstructure according to  claim 1 , wherein the substrate has a thickness of 150-210 μm. 
     
     
       7. The microstructure according to  claim 1 , wherein the first peak and the second peak are made of polyethylene terephthalate or acrylic. 
     
     
       8. The microstructure according to  claim 1 , wherein each of the first peak and the second peak has a height of 30-80 μm. 
     
     
       9. The microstructure according to  claim 1 , wherein each of the first peak and the second peak has a largest lateral length of 30-50 μm. 
     
     
       10. The microstructure according to  claim 1 , wherein each of the tip of first peak and the tip of the second peak deviates from the normal of the substrate in a range of 20-60 degrees. 
     
     
       11. An optical film comprising the microstructure according to  claim 1 , comprises a plurality of the microstructures arranged side by side in a lateral direction along the substrate. 
     
     
       12. A grating dual view liquid crystal display module, comprising:
 a light source; 
 a light guide plate; 
 a diffusion sheet formed on a light-emerging surface of the light guide plate; 
 the optical film according to  claim 11  formed on the diffusion sheet; and 
 a liquid crystal display panel formed on the optical film. 
 
     
     
       13. The grating dual view liquid crystal display module according to  claim 12 , wherein the liquid crystal display panel have a grating.